hodges



2 Sheets-Sheet 1..

P; FQHODGES. Stop-Motion- Gear.

No. 223,806. Patented J.an 27,1880.

" fla w N.FETERSv PHOYO-LITHOGRAPHER WASHINGTON. n. c.

2 Sheets-Sheet 2.

P. PJHODGES. Stop-Motion Gear.

No. 223,806. Patented Jan. 27, 1880 Iaa'uenior:

N. PETERS. PHOT0 L THOGRAPNER, WASHINGTON DC.

UNITED STATES PATENT OFFICE.

PLINY F. HODGES, OF CHICAGO, ILLINOIS, ASSIGNOR TO HIMSELF AND WILLIAMDEERING, OF SAME PLACE.

STOP-MOTION GEAR.

SPECIFICATION forming-part of Letters Patent No. 223,806, dated January27, 1880.

I Application filed September 29, 1879.

and pinion, the different figures showing the several positions of thestop and movable flange or bridge in operation; Fig. 4, a side elevationof the parts in the position shown in Fig. 3; Figs. 5 and 6, details.showing the interlocking devices; Fig. 7, a top or plan View, showingthe deviceapplied to a pinion and reciprocating rack; Fig. 8, a sideelevation of the same.

This invention has for its object the production of an intermittentrotary motion in one direction only from a reciprocating or vibratingmovement; and its nature consists in providing a movable flange orbridge for preventing rotary motion, except by the reciprocatin g orvibrating movement in one direc tion; in providing a stop forautomatically operating the movable flange or bridge to produce anengagement when required; in constructin g and arranging the stops sothat they will serve as pawls or catches for locking the shaft and itspinion when a loose pinion is used; in providing springs for returningthe movable flange, after it has been operated on by the stop, to itsnormal condition, and for keeping the stop in proper position whenacting as a locking device 3 and in the several parts and combination ofparts hereinafter set forth as new.

The invention may be applied to a reciprocating or vibrating rack,wheel, or other mechanism, in connection with a stationary or loosepinion which impart-s an intermittent rotary movement to a shaft orother device; or the wheel, rack, or other mechanism may be stationary,and the pinion may be made to hate a reciprocating or vibrating,movement, and is designed for use in mechanisms where a rotary movementin one direction only is required. V

In the drawings the devices are shown applied to two forms of mechanismbut it can be used in other constructions.

Figs. 1 to 6, inclusive, show the devices in connection with a loosepinion and a vibrating or reciprocating driving-wheel.

A represents the reciprocating or vibrating driving-wheel; B, thepinion; B, the hollow 6o shaft or collar to which the pinion is attachedor connected; 0, the shaft, which is to be given an intermittent rotarymotion; D, the head or box, forming a bearing for the shaft B; D, theconnecting-piece; E, the collar or bearin g 6 5 for the pin or journalof the driving-wheel; F, the pin or journal of the driving-wheel A; G,the movable flange or bridge; H, the stops, also serving, as shown, forthe means for lockin g the pinion to the shaft; I, the collar or head,70 supporting the shaft; a, the cogs on the wheel A; b, the cogs onthe'pinion B; c, the inclined face on the free end of the flange G; d,the pivot for the flange; e, the arm or extension of the flange orbridge; f, the spring for returning the flange or bridge; ff, the pinsfor holding the spring f,- g, the pin or stop on which the free end ofthe flange or bridge rests when in its normal condition; h, the stops orpins by which the movements of the drivin gwheel are limited; i, thesprings for throwing and holding the inner ends of the pawlsor lockingdevices into engagement; j, the studs or pins to which the outer ends ofthe springs i are secured; 7c, the pins or ,stops for preven t- 8 5 ingthe stops from being thrown out of position; Z, the outer ends of thestops; m, the engaging or looking hooks or projections on the inner endsof the stops; at, the notch or opening in the shaft B; 0, the pivots ofthe stops; 0 p, the set-screw on the end of the shaft 0.

The wheel A may be of any required size and form of construction, andmay be reciprocated by any of the well-known means, its movements beinglimited by the pins h on its 5 face striking the head or support D E, orin any other suitable manner. The teeth or cogs a, may extend entirelyaround its periphery or i only partially around, as shown.

The pinion B may be of any suitable form I00 i of construction, locatedand arranged to have its cogs or teeth I) mesh with the cogs or teeth aof the wheel A. As shown, the pinion B is rigidly secured to a hollowshaft or collar, B having its bearing in a head' or box, D, suitablyformed for the purpose, and the wheel A has its support or pin locatedin a head or bearing, E, connected with the head D by a piece, D.

The shaft 0, to which an intermittent rotary motion is to be given, hasits bearing in the hollow shaft B, and extends beyond both ends thereof,the end projecting beyond the head D in the form shown being the one towhich the devices to be opera-ted are connected.

The movable flange or bridge G is made of suitable metal, and is curvedso that its outer face will conform to or nearly to an arc of a circlecoincident with that of the wheel A. As shown, it is pivoted at d to theface of the wheel at one end, leaving its other end free'or movable, andthis free end rests, when the flange or bridge is in its normalcondition, on a pin, 9, so located on the face of the wheel as topreserve the unity between the flange and wheel, and has an incline, c,to facilitate the passage of the stop. At the pivotal end of the flangeor bridge is an armor extension, 0, with which a spring, f, located onthe face of the Wheel A and held in position by pins f f, en gages, forthe purpose of returnin g the flange or bridge after the stop has passedits free end.

The pinion B, being loose upon the shaft (3 in the construction shown,must be locked thereto in order to communicate motion, which in thisinstance is done by so forming and lo- *catin g the stops E that theirouter ends will serve as stops and their inner as lookingpawls. Thesepawls H are pivoted at 0 to a plate or head, 1, which is secured to theend of the shaft 0 by means of a set-screw or otherwise, so that itcannot turn, but will be held firmly, and, as shown, a set-screw,p, isused to prevent its slipping fromthe shaft.

The outer ends, I, of these stop-pawls projectbeyond the edge of thehead or plate I a sufficient distance to engage with the outer face ofthe flange or bridge, and their inner ends are provided with hooks orprojections m, so arranged as to engage with a notch, n, in the collarof the pinion B, so that when the hook m and the notch 02 are engagedthe pinion B will be locked with the shaft 0. These pawl-stops H arelocated between the head I and the pinion B, and their movement in onedirection is limited by pins or stops k on theplate 1, against which theouter ends will strike, and in the other direction by their inner endscoming in contact with the collar of the pinion B, (see Fig.6,) andtheir hooks m are made to engage with the notch 02 by the action of aspring, i, one end of which engages the inner end of each stop, and theother end is attached to a pin or stud,j, on the face of the head I.

Two stops, H, in the form of construction shown, are used, so that thepinion and shaft are only-locked together to produce a half-revolutionof the shaft at each engagement. If one stop were used, an entirerevolution of the shaft 0 would result.

In operation, with the parts in the position shown in Fig. 3, the pinionmoving toward the free end of the bridge or flange G, and the point orhook m engaged with the notch 11, the movement given to the pinion fromthe wheel will be transmitted tothe shaft 0, because the stop, pinion,and shaft are locked together, and the shaft must revolve with thepinion. Such rey'olution continues until the parts are in the positionshown in Fig. 1, at which time the end Zwill come in contact with theincline c and the end of the flange will be moved out of the path of I,so that the stop can pass the flange, and the parts will be in theposition shown in Fig. 2, the action of the springreturning the flangeor bridge to its normal condition as soon as the stop passes its end. Areverse movement is then given to the wheel A, rotating the pinion B inthe opposite direction; but such rotation will not be communicated tothe shaft 0, because the rotation of the pinion will bring the end Z ofthe stop into contactwith the-outer face of the flange or bridge G,disengaging the hook m from the notch n and disconnecting I the pinion Bfrom the shaft 0, so that the pinion can revolve, but the shaftwillremain stationary, the shaft and pinion maintaining this relation aslong as the stop and flange or bridge are engaged, or until the wheel Acompletes its return movement and is again carried forward, when thespring'i will throw the hook on into engagement with the notch 11,connecting the shaft 0, pinion B, and stop H, so that the movement ofthe pinion will be communicated to the shaft, and these movements willcontinue as long as the wheel A is reciprocated.

The wheel A might be given a complete revolution before being reversed,and other forms of mechanism than a loose pinion and central shaft to bedriven can have the movable flange and stop applied to produce a rotarymovement in one direction only.

Figs. 7 and 8 show the movable flange or bridge and a stop applied to astationary rack and a reciprocating mutilated gear or pinion to producean intermittent rotary movement. A represents the rack-frame; B themutilated gear or pinion,which is to be reeiprocated in any wellknownmanner, the rack-frame being stationary; (J, the arbor or shaft to whichthe pinion B is rigidly secured; D, the reciprocating bar carrying thepinion; E, the guiding and retaining bar for keeping the bar D inposition. These parts may be of any of the well-known forms ofconstruction, arranged and operating in the usual manner, the pinionhaving its cogs or teeth I) in mesh with the cogs or teeth a of the rackfor revolving the pinion.

G is the movable flange or bridge, having an inclined face, 0, andpivoted at d to the rackframe in the same relation to the rack as to thewheel A. This flange, when in its normal condition, rests on a p n, g,on the face of the rack, and is returned, after it has been raised forthe passage of the stop, by the spring f, one end of which is secured toa pin, f, on the rack, and the other engages a pin, 6, secured in thefree end of the flange or bridge, and operates in the same manner asbefore described for the wheel A.

His the stop, rigidly secured to the pinion at the point where the teethare removed, and having an end, Z, projecting beyond the periphery ofthe pinion a sufficient distance to come in contact with the outer faceof the flange, and to come beneath the incline a and raise the flange orbridge out of its path when the pinion is revolving.

I is the movable (log-or latch, pivoted at one end to the face of thepinion, and having its other end provided with a hook or catch, m, toengage with a notch, a, in the edge of the flange, near its pivotal end,for throwing the pinion into mesh with the rack, the book be in g throwninto engagement with the notch by the action of the spring i, one end ofwhich engages with the dog or latch, and the other I is attached to astud or pin, j, on the face of the pinion.

The pinion B, in this construction, is not loose upon its shaft orarbor, and the stop H is rigidly attached to the pinion, and does notact asa pawl to lock the pinion to the shaft, but operates only as astop to prevent the rotation of the pinion when the flange is engagedwith the stop; but the essential feature of my inventiona movable flangeor bridge-operates similarly in both attachments or forms ofconstruction shown, and can be applied to pro duce a rotary movementwith other devices in one direction only, and intermittently.

What I claim as new, and desire to secure by Letters Patent, is

1. A movable bridge or flange arranged and operating with a.reciprocating device, substantially as and for the purposes specified.

2. A movable bridge, in combination with a reciprocating device and astop operatingwith said bridge, to impart an intermittent rotary motionin one direction only, substantially as described. 7

3. A movable bridge and a stop, in combination with a rack and pinionarranged and operating to produce an intermittent rotary movement in onedirection only from a reciprocating movement of either the rack orpinion, substantially as described.

4. The stop H, provided with a hook or projection, m, in combinationwith a loose pinion, B, provided with a notch, n, a movable flange orbridge, G, and a reciprocating mechanism,

whereby an intermittent rotary motion in one direction only will beimparted, substantially as specified.

5. The flange or bridge G, provided with a pin or arm, 6, and spring f,in combination with the stop-pawl H and stop 70, arranged relative toeach other on a pinion, and a reciprocatin g rack or wheel,substantially as and for the purposes specified.

6. The combination of the rack or wheel A, the pinion B, one or morestops, H, and the latchor bridge G, as and for the purposes specified.

PLINY F. HODGES.

Witnesses: O. W. BOND,

HEINR. F. BRUNs.

